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[@more@] 排名 名称 厂商 特点 1 DDS DDS 双向复制、SQL转换、图形监控 2 iReflect DataMirror Oracle认证、图形界面 3 goldengate goldengate 双向复制、异构数据库、图形界面 4 Shareplex Quest sql语句复制（非交易） 5 RealSync DSG 6 stream Oracle SQL转换 7 data guard Oracle 可以同步复制 以上基本都是基于日志分析的复制产品（data guard除外）。 本排名由个人分析，非官方认证。 转自:http://replication.blog.51cto.com/222909/41198

Exp時遭遇 EXP-00008 ORA-00942 EXP-00024 EXP-00000 Exp時遭遇 EXP-00008 ORA-00942 EXP-00024 EXP-00000About to export specified users .... exporting pre-schema procedural objects and actions. exporting foreign function library names for user QCSYSTEM. exporting PUBLIC type synonyms. exporting private type synonyms. exporting object type definitions for user QCSYSTEMEXP-00008: ORACLE error 942 encounteredORA-00942: table or view does not existEXP-00024: Export views not installed, please notify you

To begin troubleshooting, check the following top issues. If your issue is listed, select the link, otherwise proceed to step 2.SCSI adapter is not seen during POST/startupSCSI adapter is not seen in the operating systemSCSI device is not seen during POST/startupSCSI device is not seen in the operating systemOperating system not found after adding a SCSI adapterPOST error 1801 when multiple SCSI adapters installedSCSI errorsCheck IBM ServerProven to ensure all options are compatible with your sy

The IBM Tapetool (tape-tool) contains diagnostic utilities and applications, device drivers, user's and operator's guides, hardware maintenance manuals, firmware and errata, and error log gathering routines for IBM tape drives, tape libraries, and tapeautoloaders. Note: ibm_utl_tape_tapetool-1.08.25_anyos_noarch.iso - Tape tool version 1.08.25MD5 checksum = 06cdc40050a07ba3d411bff2e980109e[@more@]File detailsVersion: 1.08.25Release Date: 2007-10-01File link File size File description

Note: Diagnostics must be completed and any error codes or messages noted prior to hard disk drive replacement. Noisy drives are not always defective. Some are just inherently noisy. Compare noise levels against another identical drive with the same field replacement unit (FRU).Data backup is an important part of any computer security program. Some of the procedures below may result in complete data loss. Make sure all important data has been backed up before continuing.[@more@]To begin troubles

Note: ServeRAID controllers in cluster or fault-tolerant environments require additional troubleshooting techniques which are detailed in the User's Reference (SRAID.PDF) contained in the BOOKS directory of the ServeRAID Support CD.[@more@]If you need definitions:drive state descriptions write-cache mode for logical drives ServeRAID controller feature overview tableTo begin troubleshooting, check the following top issues. If your issue is listed, select the link, otherwise proceed to step 2.Bad

SymptomMismatched ServeRAID software levels can result in system problems. Mismatched version levels are not tested together and may result in stability problems when installed and used together for any significant period of time.Symptoms might include, but are not limited to:Defunct Disk Drives (DDD) Erratic performance Loss of ServeRAID configuration POST error messages ServeRAID error messages[@more@]Affected configurationsNote: This document only pertains to systems that meet the following c

This document is intended for trained servicers who are familiar with IBM Personal Computer products. Use this document along with advanced diagnostic tests to troubleshoot problems effectively. Before servicing an IBM product, be sure to review the safety information. Click here to review safety information.[@more@]In the following index, X can represent any number.Error Code FRU/Action 000 SCSI adapter not enabled. Verify adapter device and Bus Master fields are enabled in PCI configuration pr

The demand for very large drive capacities has created the need to group many physical disks together in the form of arrays and logical drives. It is important to understand certain aspects of hard disk technology to understand the function of synchronization.While a drive is in manufacturing, a set of low level tests is run against it to establish two internal sector lists. These tests create the "known good sectors" and the "known bad sectors" lists. The hard drive is then

To begin troubleshooting, check the following top issues. If your issue is listed, select the link, otherwise proceed to step 2.What are Bad Stripe Table entries? What are Bad Stripe Table (BST) limitations? What are the conditions conducive to the appearance of bad stripes? How to minimize the risk of bad stripes How to maintain ServeRAID How does an operating system react when it tries to read or write to a bad stripe? How can Bad Stripes Table entries be removed from an Array/Logical Drive? H

为什么要对rootvg做镜像如果你的系统的rootvg仅有一块硬盘，当灾难来临的时候，例如硬盘损坏，这就意味着你的系统就再也不能启动了。尽管你可能拥有mksysb的磁带，但你仍然需要花费很多的时间去处理这个原本很小的问题。rootvg镜像能够提供单机bos容错，使得你能够用最短的时间摆脱这种困境，简单到只需要一次重新启动。[@more@]制作rootvg的标准步骤 1. extendvg2. chvg –Qn3. mirrorvg –s4. syncvg –v5. bosboot –a6. bootlist7. shutdown –Fr8. bootinfo –b1、首先将一个pv加入到rootvg中，例如：hdisk1。#extendvg rootvg hdisk

1、默认安装RHEL4。2、安装telnet与rsh服务，并设置。3、安装系统所差的RPM。[@more@]1、默认安装RHEL4。2、安装telnet与rsh服务，并设置。3、安装系统所差的RPM。查年需要的以下RPM包有没有安装，未安装的用rpm -Uvh 安装。rpm -q make compat-db compat-gcc-32 compat-gcc-32-c++ compat-oracle-rhel4 compat-libcwait compat-libgcc-296 compat-libstdc++-29

Oracle的RAC要求数据库建在裸设备上，在单机里也可以将库建在裸设备上，这样可以优化数据库性能。下面操作在RHEL4上，Oracle为9.2.0.8。系统与数据库安装完成，数据库未建库。[@more@]Oracle的RAC要求数据库建在裸设备上，在单机里也可以将库建在裸设备上，这样可以优化数据库性能。 下面操作在RHEL4上，Oracle为9.2.0.8。系统与数据库安装完成，数据库未建库。新增一硬盘sdc为存储数据库数据。 1、建立LVpvcreate /dev/sdcvgcreate datavg /dev/sdclvcreate -L 40M -n lv_cwmlite datavg使用lvcreate建立lv_cwmlite、lv_drsys、lv_exampl